Ultrastructure of the corona of scented and scentless flowers of Passiflora spp. (Passifloraceae)

Only Attract Ants? The Versatility of Petiolar Extrafloral Nectaries in <i>Passiflora</i>

“…The crateriform morphology of EFN from P. alata can provide a microenvironment to confine terpenoids synthesized by the idioblasts, analogously to the corona in the flowers of Passiflora [44]. Terpenoids are the major volatile compounds issued by plants as an answer to herbivory, signalling to carnivorous arthropods either to prey or to parasitize herbivorous [45].…”

Floral scent of brazilian Passiflora: five species analised by dynamic headspace

“…Spots of vanillin and raspberry ketone. Amela García et al (2007), the floral biology of approximately 23 species of Passiflora has been studied, although more than 525 species have been described (MacDougal and Feuillet 2004). At least 30 of these species produce floral fragrances perceivable by the human nose (see citation in Amela García et al 2007), yet, until the year 2012, the volatile compounds of only a few species (c.a 12) of Passiflora had been identified (Lindberg et al 2000, Varassin et al 2001.…”

“…Amela García et al (2007), the floral biology of approximately 23 species of Passiflora has been studied, although more than 525 species have been described (MacDougal and Feuillet 2004). At least 30 of these species produce floral fragrances perceivable by the human nose (see citation in Amela García et al 2007), yet, until the year 2012, the volatile compounds of only a few species (c.a 12) of Passiflora had been identified (Lindberg et al 2000, Varassin et al 2001. Besides, olfactory tests with floral parts of nine species have been conducted, showing that the odors comprising the floral fragrances are emitted by different parts of the flower, particularly by the corona filaments (radii) in which the secretory tissue involves the entire perimeter of each filament (Amela García et al 2007).…”

“…MONTERO et al fruit´s aroma have been collected and analyzed several times (Galvão et al 2004, Janzantti et al 2012, Werkhoff et al 1998, although floral scent of passionflowers had received little attention. In Brazil, the composition and emission of floral scent in four species of Passiflora from the Atlantic Forest was investigated trough solvent extraction by Varassin et al (2001); other authors have studied scent emissions by olfactory tests (Amela García 1999, MacDougal 1994, Amela García et al 2007) and some other works have been focused on the role of floral scent in ecological dynamics like pollination syndromes among Passiflora species (Jazen 1968, Sazima and Sazima 1978, 1987, Koschnitzke and Sazima 1997.…”

“…The production of volatile compounds in Passiflora is highly variable and has major ecological importance (Varassin et al 2001, Amela García et al 2007. During the last twenty years, the collection and characterization of volatile compounds from live flowers by headspace/gas chromatograph coupled to mass spectrometer (HS/GC-MS) methods.…”